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Marathon Oil Corporation, based in Houston, is an independent exploration and production company focused on significant oil-rich resource plays in the U.S. and international operations in Equatorial Guinea. Marathon Petroleum Corporation, headquartered in Findlay, Ohio, is a leading integrated downstream energy company with the nation's largest refining system and branded retail outlets across the United States. Generated from the website

Shell is a global group of energy and petrochemical companies, known for its presence in various sectors of the energy industry. Learn more about Shell's operations and contributions to the global energy landscape on their comprehensive global website. Generated from their website's infomation